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Genuine-fake identification method of west lake dragon well tea with geographical sign protection

A geographical indication, authenticity technology, applied in the preparation of test samples, measuring devices, instruments, etc., can solve the problems of high price, difficult to distinguish shape, taste, aroma, etc., to promote development, standardize use, and protect rights and interests Effect

Inactive Publication Date: 2008-11-12
TEA RES INST CHINESE ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, West Lake Longjing is very seriously affected by counterfeit and shoddy products. Due to the high quality and high price of West Lake Longjing, in the tea market in various places, it is a phenomenon that tea produced outside the origin of West Lake Longjing is used to pretend to be West Lake Longjing. very common
But for now, it is difficult to distinguish West Lake Longjing tea from other flat teas made with Longjing tea processing techniques in other areas in terms of shape, taste, aroma, etc.

Method used

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  • Genuine-fake identification method of west lake dragon well tea with geographical sign protection
  • Genuine-fake identification method of west lake dragon well tea with geographical sign protection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The specific description of the identification of the authenticity of West Lake Longjing is as follows:

[0016] 1. Pretreatment of samples

[0017] The sample is pulverized. The specific process is: weigh about 20g of tea sample, put it into a traditional Chinese medicine pulverizer (about 20000r / min) and pulverize it for about 30s, then pass the pulverized powder through a 40-mesh sieve, and then accurately weigh it. Take 10g as the near-infrared analysis material.

[0018] 2. Acquisition of sample spectra

[0019] The near-infrared spectrum of the pulverized sample was collected on an IFS 28 / N (Bruker, Germany) near-infrared spectrometer, and the random software was: Opus Quant 2, and its absorption spectrum was collected in mode. The spectrum is the average of 64 scans, and the scan area is 10000-3500cm-1. The interval of data points is 3.857cm-1, so there are 1946 data points for NIR spectrum. During collection, the room temperature was controlled at about 25°C...

Embodiment 2

[0028] Using 19 non-West Lake Longjing samples (using the processing technology of Longjing tea), the specific description of authenticity identification of West Lake Longjing tea is as follows:

[0029] 1. Pretreatment of samples

[0030] The sample is pulverized. The specific process is: weigh about 20g of tea sample, put it into a traditional Chinese medicine pulverizer (about 20000r / min) and pulverize it for about 30s, then pass the pulverized powder through a 40-mesh sieve, and then accurately weigh it. Take 10g as the near-infrared analysis material.

[0031] 2. Acquisition of sample spectra

[0032] The near-infrared spectrum of the pulverized sample was collected on an IFS 28 / N (Bruker, Germany) near-infrared spectrometer, and the random software was: Opus Quant 2, and its absorption spectrum was collected in mode. The spectrum is the average of 64 scans, and the scan area is 10000-3500cm-1. The interval of data points is 3.857cm-1, so there are 1946 data points for...

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Abstract

The present invention provides a method for discriminating West Lake Dragon Well tea protected by geographic identification, which incorporates near infrared technique and chemometrics (PLS method) and provides a reliable method for discriminating West Lake Dragon Well tea in the market. The method comprises: crushing and sieving tea samples, and collecting the data on an IFS 28 / N near infrared spectrograph at a room temperature controlled within 20-25 DEG C; establishing the dependent variable 'Y' and independent variable 'X' of genuine and fake samples of West Lake Dragon Well tea; choosing the samples randomly as a training set; utilizing a cross validation method and the original light spectrum to establish an evaluation model for West Lake Dragon Well tea with PLS method, and then making a judgment with '0' as the median value. The present invention establishes a reliable method for discriminating West Lake Dragon Well tea, overcomes the challenge of discriminating West Lake Dragon Well tea in the market, and is helpful for enhancing protection of West Lake Dragon Well tea, regulating the use of geographic identification of West Lake Dragon Well tea in the market, and promoting the development of West Lake Dragon Well tea.

Description

technical field [0001] The invention belongs to an identification method of West Lake Longjing, and mainly relates to authenticity identification of West Lake Longjing protected by geographical indications, and specifically uses near-infrared combined with partial least squares (PLS) analysis technology to identify the authenticity of West Lake Longjing. Background technique [0002] With the establishment of TRIPS on January 1, 1995, the protection of geographical indications has attracted the attention of various countries. With the development of the economy and the development of the market, the correct use and protection of geographical indications is becoming more and more important. But on the other hand, many enterprises have greatly reduced the competitiveness of their agricultural products in the international market due to ignoring the use of geographical indications. Therefore, how to protect geographical indications from abuse and counterfeiting has attracted t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/35G01N1/28G01N21/3563G01N21/359
Inventor 成浩周健王丽鸳刘栩
Owner TEA RES INST CHINESE ACAD OF AGRI SCI
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